The regulation of renal phosphate transport

Adv Chronic Kidney Dis. 2011 Mar;18(2):77-84. doi: 10.1053/j.ackd.2011.01.005.


Renal phosphate transport is mediated by the abundance and activity of the sodium-dependent phosphate transporters, Npt2a, Npt2c, and PiT-2, present within the apical brush border membrane of the proximal tubule. Recent studies have demonstrated differential expression and activity of these sodium-dependent phosphate transporters within the proximal tubule. In general, phosphate transport is regulated by a variety of physiological stimuli, including parathyroid hormone, glucocorticoids, vitamin D3, estrogen, and thyroid hormone. Phosphatonins are now recognized as major regulators of phosphate transport activity. Other factors that affect phosphate transport include dopamine, dietary phosphate, acid-base status, lipid composition, potassium deficiency, circadian rhythm, and hypertension. Studies have shown that the PDZ-containing sodium/hydrogen exchanger regulatory factor (NHERF) proteins, specifically NHERF-1 and NHERF-3, play a critical role in the physiological regulation of phosphate transport, particularly in response to dietary phosphate. In addition, recent studies have found that NHERF-1 is also important in both the parathyroid hormone- and dopamine-mediated inhibition of phosphate transport. This review will detail the various hormones and agents involved in the regulation of phosphate transport as well as provide a brief summary of the signaling pathways and cytoskeletal proteins active in the transport of phosphate in the renal proximal tubule.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Absorption
  • Biological Transport, Active
  • Dopamine / metabolism
  • Fibroblast Growth Factors / metabolism
  • Homeostasis
  • Hormones / metabolism
  • Humans
  • Ion Transport
  • Kidney Tubules, Proximal / metabolism*
  • Parathyroid Hormone / metabolism
  • Phosphates / metabolism*
  • Phosphoproteins / metabolism
  • Phosphorus, Dietary / metabolism
  • Signal Transduction
  • Sodium-Hydrogen Exchangers / metabolism
  • Sodium-Phosphate Cotransporter Proteins / metabolism


  • Hormones
  • Parathyroid Hormone
  • Phosphates
  • Phosphoproteins
  • Phosphorus, Dietary
  • Sodium-Hydrogen Exchangers
  • Sodium-Phosphate Cotransporter Proteins
  • sodium-hydrogen exchanger regulatory factor
  • Fibroblast Growth Factors
  • Dopamine